#!/bin/sh
die () {
	echo "$@" 1>&2
	exit 1
}
test -d autoconf && test -f autoconf/configure.ac && cd autoconf
test -f configure.ac || die "Can't find 'autoconf' dir; please cd into it first"
#autoconf --version | egrep '2\.6[0-9]' > /dev/null
#if test $? -ne 0 ; then
#  die "Your autoconf was not detected as being 2.6x"
#fi
cwd=`pwd`
if test -d ../../../autoconf/m4 ; then
  cd ../../../autoconf/m4
  llvm_m4=`pwd`
  llvm_src_root=../../..
  llvm_obj_root=../../..
  cd $cwd
elif test -d ../../llvm/autoconf/m4 ; then
  cd ../../llvm/autoconf/m4
  llvm_m4=`pwd`
  llvm_src_root=../..
  llvm_obj_root=../..
  cd $cwd
else
  while true ; do
    echo "LLVM source root not found." 
#    read -p "Enter full path to LLVM source:"
    REPLY="../llvm/llvm-2.4"
#    if test -d "$REPLY/autoconf/m4" ; then
      llvm_src_root="$REPLY"
      llvm_m4="$REPLY/autoconf/m4"
#      read -p "Enter full path to LLVM objects (empty for same as source):"
#      if test -d "$REPLY" ; then
#        llvm_obj_root="$REPLY"
#      else
        llvm_obj_root="$llvm_src_root"
#      fi
      break
#    fi
  done
fi
# Patch the LLVM_ROOT in configure.ac, if it needs it
#cp configure.ac configure.bak
#sed -e "s#^LLVM_SRC_ROOT=.*#LLVM_SRC_ROOT=\"$llvm_src_root\"#" \
#    -e "s#^LLVM_OBJ_ROOT=.*#LLVM_OBJ_ROOT=\"$llvm_obj_root\"#" configure.bak > configure.ac
echo "Regenerating aclocal.m4 with aclocal"
rm -f aclocal.m4
aclocal -I "../$llvm_m4" -I "../$llvm_m4/.." || die "aclocal failed"
echo "Regenerating configure with autoconf 2.6x"
autoconf --warnings=all -o ../configure configure.ac || die "autoconf failed"
cd ..
exit 0
